Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbbf726003a8fd8…

MALICIOUS

PDF

54.8 KB Created: 2021-05-12 17:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 31390d1bf36221eb77a8e0824d83106f SHA-1: b64a0291c7519ac044cbbbb46f3b3c5941768473 SHA-256: cdbbf726003a8fd8a3d9841b60f42c944030e1a2daaa5c885ca7e5243e56821a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest malicious intent. The document body, though heavily obfuscated, contains a title related to printer issues, likely a lure to encourage users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6921

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/strik?utm_term=why+does+my+hp+printer+not+stay+online PDF link annotation
    • http://5dradio.ru/94694474665tz2ys.pdfIn PDF document text
    • http://dreabling.online/facebook_videos_without_any_app0jqk1.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/ji4I9QC/26464062634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451544/normal_5ff30ccf2112b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_5fd226fbea369.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/ijejiGC/kozuxudivunit.pdfIn PDF document text
    • http://everydays.space/livro_sobre_candombl7i22a.pdfIn PDF document text
    • https://cdn.sqhk.co/folukize/fkOTCTy/kulijesekime.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/IsCjcQr/extreme_basketball_trick_shots.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_6004da8cc0e3f.pdfIn PDF document text
    • http://themarkuzmusic.com/chicago_manual_of_style_reference_generatorw3xwf.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_01f9da901df74223ac49fdc2e7f65551.pdf?index=trueIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_59d270ef60fc419ea0cef2e8e3b7be9c.pdf?index=trueIn PDF document text
    • http://voxinuxo.epizy.com/59436862357.pdfIn PDF document text
    • http://bumevibil.epizy.com/kexelekox.pdfIn PDF document text
    • http://vapamul.epizy.com/diablo_3_season_22_best_class_set.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/jotunegokatudopixapu.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/how_to_tie_an_adjustable_single_knot_bracelet.pdfIn PDF document text

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